Which one is not a pollutant normally?

Hydrocarbons

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Carbon dioxide

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Carbon monoxide

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Sulphur dioxide

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Solution

The correct option is B Carbon dioxide
Carbon dioxide normally is a greenhouse gas that helps in maintenance of the temperature of the earth surface. It is also used as an ingredient of photosynthesis by the plants. However, anthropogenic release of carbon dioxide disrupts the equilibrium such that it starts contributing to the global warming. Hydrocarbons, carbon monoxide, and sulphur dioxide are pollutants that are released due to the burning of fossil fuels.
Hence, the correct answer is 'Carbon dioxide'.

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Similar questions

Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent?

(a) carbon dioxide

(b) nitrogen monoxide

(d) sulphur dioxide

Which of the following air pollutant is capable of preventing photosynthesis in plants?

(a) CFCs

(b) nitrogen oxide

(d) carbon monoxide

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